The ONS hosts samples of microdata for England and Wales, Scotland, and Northern Ireland that can be accessed for research purposes.

The UK censuses took place on 27 March 2011. They were run by the Northern Ireland Statistics & Research Agency (NISRA), National Records of Scotland (NRS), and the Office for National Statistics (ONS) for both England and Wales. The UK comprises the countries of England, Wales, Scotland and Northern Ireland. ONS is responsible for disseminating census statistics for the UK.

Statistics from the UK censuses help paint a picture of the nation and how we live. They provide a detailed snapshot of the population and its characteristics, and underpin funding allocation to provide public services. This is the home for all UK census data.

The Statement of Agreement of the National Statistician and the Registrars General for Scotland and Northern Ireland

This statement ensures that the independent censuses carried out in each constituent country of the UK are able to provide consistent and high quality statistics that meet user requirements for UK level data.